{"trustable":false,"sections":[{"title":"","value":{"format":"PLAIN","content":"Sample Input\n3 3\nHow to compete in ACM ICPC,Peter,peter@neerc.ifmo.ru\nHow to win ACM ICPC,Michael,michael@neerc.ifmo.ru\nNotes from ACM ICPC champion,Michael,michael@neerc.ifmo.ru\n2 3\n1,Peter,peter@neerc.ifmo.ru\n2,Michael,michael@neerc.ifmo.ru\nSample Output\nNO\n2 3\n2 3\nYES"}}]}